Use XGrabPointer instead of XChangeActivatePointerGrab() to change the cursor during a pointer grab

ui/views/widget/desktop_aura/x11_pointer_grab.h

Index: ui/views/widget/desktop_aura/x11_pointer_grab.h
diff --git a/ui/views/widget/desktop_aura/x11_pointer_grab.h b/ui/views/widget/desktop_aura/x11_pointer_grab.h
new file mode 100644
index 0000000000000000000000000000000000000000..6c1ac931ed563fdbd415ce80b3d6fa0f7ef47cc8
--- /dev/null
+++ b/ui/views/widget/desktop_aura/x11_pointer_grab.h
@@ -0,0 +1,21 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/gfx/x/x11_types.h"
+
+typedef unsigned long Cursor;
+
+namespace views {
+
+// Grabs the pointer. It is unnecessary to ungrab the pointer prior to grabbing
+// it.
+int GrabPointer(XID window, bool owner_events, ::Cursor cursor);
+
+// Sets the cursor to use for the duration of the active pointer grab.
+void ChangeActivePointerGrabCursor(::Cursor cursor);
+
+// Ungrabs the pointer.
+void UngrabPointer();
+
+}  // namespace views